Question detail
What is a closed system in the context of equilibrium?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Reversible reactions and dynamic equilibrium
Question
- A. A system where reactants can escape
- B. A system where products can escape
- C. A system where no matter can enter or leave
- D. A system where reactions do not occur
Answer
A system where no matter can enter or leave
Explanation
The correct answer is A system where no matter can enter or leave. This answer directly addresses the question: What is a closed system in the context of equilibrium? It matches the approved Chemistry 8462 learning objective and the linked subtopic. The other options are incorrect because they either change the rate, catalyst, reversible reaction, equilibrium, or graph context, or they do not answer the exact point being tested.
Common mistake
Closed vs Open System Confusion
Students often think that a closed system can exchange matter with its surroundings, so they believe equilibrium can be achieved in an open system as well.
Clarify that a closed system cannot exchange matter (only energy) with its surroundings; only in a closed system can a reversible reaction reach dynamic equilibrium because the amounts of reactants and products remain fixed. In an open system, continuous addition or removal of substances prevents the system from stabilising at constant concentrations, so true equilibrium cannot be achieved.
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